Q7 of 18 Page 48

Match the following.

(i) - f


Clothes made from polyester are easy to wash, affordable and durable.


(ii) – e


Code 1 is the special number that is given to PET by the government that tells us that the given stuff is made up of PET.


(iii)-b


Rayon is prepared in the lab upon reacting wood pulp with some chemicals that are the constituent of the natural silk so it is called artificial silk as it has similar properties as that of natural silk.


(iv) – g


This is the because of the fact that even a nylon thread is said to be stronger than steel wire.


(v) – d


Melamine is the thermosetting plastics. So can withstand high temperature so in case of overheating switch does not change its shape.


(vi) – c


Polythene is the polymer that is made up of large no of monomers which are ethene joined in the linear fashion.


(vii) – a


Bakelite is resistant to heat and is non-conductive in nature so the food remains hot for longer period of time.


More from this chapter

All 18 →
5

Thermoplastics are eco-friendly than thermosetting plastics. What do you say? Why?

 6

Explain following.

a) Blending b) Biodegradable c) Recycling d) Decomposition

 8

Fill in the blanks

i) Synthetic Fibres are also called as ______ Fibres.


ii) Synthetic Fibres are synthesized from a raw material called ______


iii) Like synthetic fiber, plastic also ______


iv) Clothing labels are______


a) Required by law


b) Identify fabric content


c) Both a and b


d) None of the above


v) Rayon is made of


a) Coal b) Oxygen c) Flax d) Cellulose


vi) A silk fiber’s smooth surface absorbs light


a) yes b) no c) can’t say

 9

Where do we use the process of recycling? How is it useful? Give examples.